Electric furnace.



A. SCOTT-HANSEN. ELECTRIC FURNACE. APPLICATION FILED JAN. 6, 1914.

Patented May 12, 1914.

. U ITED STATES PATENT OFFICE. A

ALF SCOTT-HANSEN, or crrmsrrnmn, n w, ASSIGNOB. T NORSK 11 m ELEK'IRISK KvAnLs'rorAn'rIEsnLsKAB, or CHRISTIANIA, NORWAY.

nnncriuo summon.

a subject of the King of Norway, residing at Christiania, Norway, have invented certain new and useful Improvements in Electric Furnaces; and I dojhereby 'decla re the following to be a full, clear, and exact 'de,

scription of the-invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference beinghad to the accompanying drawg ings; and to letters or figures of reference.

marked'thereon, which form'a part of this specification. j i

This invention relates to im rovements in the gas-supply in electric arc urnaces.

In electric furnaces operating with mag: netically' spread disk shap'ed'flam'es the air or gases, respectively) as a rule has been introduced at about rightangles to the flaine] disk. I have now found thatby conducting the gases in such a manner'that the two currents of gas passing from thesides of the furnace inwardly, toward theffia-Inedisk will, considered as a whole",fas sume the form more or less of-truncatedlcones having their base in the plane of theffiamediskf Various advantages will be obtained, said advans tages being partially a'ssisted,i'f thepassage's be at the same time so inclined that a rotary motion will be imparted to the gas cones:

The output of the furnace will be improved by the fact that the gases maybe more easily directed in the proper quantities inwardly. toward the various 'zones'of the flame disk, inter because, with the new manner of supply, disturbances will nbt' so easily occur through fwhirlmotion produced by too sudden change of the direction of motion. Furthermore it is of advantage for the efii ciencyof' the fur'n ce that the gas particles are caused to 011 w the flame disk with a more readily controllable velocity without the possibility of being thrown back and of partaking in the aforesaid disturbing whirl. motions which are detrimental to the reaction action. The direction of'motion imparted to the gases will drive the same with greater velocity toward the outlet openings and the cooling. "It willialso be; ossible with the new method of conducting ti to somewhat reduce the economy and otherwise e gases. ization', which is of advantage both with -'respect.wto. I

. v sp read disk shaped flames, passages for mode of: carrying -out the invention is nlustratedby way of example in the accompanymg drawing which represents a section through the furnace. The arrows indicate the passage of the'gases.

the furnace, b the outlets for the gases. The object of the chambers a, eachof which comis to enable the air or gas to be distributed 7 In this manner also gases of different nature, or' of difierent temperatures, may be supplied'to the difi'erent zones of the furnace. If it is desired to use, in a known manner, previously treated, cooled gases for quickly cooling the reaction gases, the same may be supplied through the outer gas distribution chambers.

As it Will be seen from the drawing, the air or gas supply passages c, arenarrowed inwardly toward the flame chamber. Thereby it is rendered possible not only to use a higher pressure for the gases but a more reliable cooling action will be insured, and also the danger .of electrically overcharging the surface of the brickwork will be reduced by the increased velocity of the entering air or gases, respectively.

, I-claim: i v

1.. In electric furnaces with magnetically spread disk shaped vflames, passages for blowin currents of air or as from the sides of the igxrnace toward the ame disk into the .furnace chamber, said passages being so directed that the currents, considered as a whole, will assume't'he form of truncated the flame disk.

2. In electric furnaces with magnetically 's read disk shaped flames, passages for blowing currents of air or gas from the sides of the furnace toward the flame disk, into-the furnace chamber, said passages being so directed that the currents, considered as a whole, will assume the form of truncated'eoneshaving a common base in the planeof the flainedisk and being given such a position that arotary motion will be j' respectively, blowing against the flame.

3; Inelectric furnaces with magnetically a designates annular gas distribution chambers provided for the various zones of municate separately with a gas supply pipe,

at will to the various parts of the furnace.

cones having'a common base in the plane of imparted'to the two currents of air or gas,

Patented May 12 191 4.

blowing currents of air or gas from the sides of the furnace toward the flame disk, into the furnace chamber, said passages being so directed that the currents, considered as a whole, Will assume the form of truncated cones having a common base in the plane of the flame disk, said passages communicating in groups With distribution chambers.

4:, In electric furnaces with magnetically spread disk shaped flames, passages for blowing currents of air or gas from the sides of the furnace toward the flame disk, into the furnace chamber, said passages being so directed that the currents, considered as a Whole, will assume the form of truncated cones having a common base in the plane of the flame disk and being given such a position that a rotary motion will be imparted to the two currents of air or gas, blowing against the flame, and outer chambers for supplying cooled reaction gases to the flame chamber.

5. In electric furnaces With magnetically spread disk shaped flames, passages for blowing currents of air or gas from the sides ofthe furnaces toward the flame disk, into the furnace chamber, said passages being so directed that the currents, considered as a whole, will assume the form of truncated cones having a common base in the plane of the flame disk, said passages being narrowed in a direction toward the flame chamher.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing Witnesses.

' ALF SCOTT-HANSEN.

\Vitnesses:

M. E. GU'r'roRMsnN', RUTH LINDs'rROM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

' Washington, D, C. 

